Lens



, ,following is a specification.

referirse seria, reza. y 1 -,$3,535 Mitiliiii? TTSFTENT FZiQ.

raux, P. Henin, oiirnwanir, New ausser,

LENS.

.application ined Deember 7, 1922. amai in. 605,430. To aZZ whom t may concern: ward the center of the lens, that is, the angle I it known that I, PAUL P. HonNI, a`l at L is greater than the angle at b, and so citizen of the United States, 'and a resident on to the edge, where the least angle is at of Newark, county of Essex, and State of the outermost of said faces or prisms, indi- |50 New Jersey, have invented certain new and cated at c.

useful Improvements in Lenses, of which the The contrary is carried out on the insidel or annular ribs, in that the outer prism d .This invention relates to an improved lens hasA a greater angle than the innermost of and is of the type that is particularly adaptthe prisms at e, these annular prisms being ed for use in traic signals and similar-situgraduated so that they7 have a greater angle ations Where a strong but dilused light is toward the rini of the lens.

desired, so that it is' Well adapted for a d'ayf This forni of lens, shown in Figures 1, 2, light signal, in that even in sun light it ap- 3 and 4, when placed in front of the source pears sharply outlined :is a luminous body of light, as is usual in trailic towers and rather than as a glaring light. posts` switch signals and the like, shows a The invent-ion is also designed to procircular luminous body to the eye and has vide a lens which is easily and cheaply mannov glare, but is calculated to he easily disufactured and which, with slight modiicaceriied and call attention when lighted, even tions, can show a luminous translucent eiect as a daylight signal when used in the sun. 76

In some situations it is necessary to prosharply at various distances from the lens.

`Tlie invent-ion is illustrated in the acconi- Vide such luminous body effect-directly in panying drawing, in which` Figure 1 isa 'front of the signal and also to one side, as front View of a lens' made according to my in traffic posts Where it is necessary to plac invention, and Figure 2 is a hack view of the such posts a little out of the line of travel 90' lens shown in Figure l. Figure 3 is an enof the vehicles in one direction. In this larged view, one-hall ot' it being shown in case 'il extend the straight parallel ribs only section on line 3-3 in Figure l. Figure el to one-half of the lens, as shown in Figure 6, is a top view oit the lens shown in Figures these ribs being at right angles to the line 1, 2 and 3. Figures 5 and 6 are front views oi division shown at 16, the rest of the out-ei' 85 showing modified forms of the front face of face of the lens being of a generally spherithe lens, and Figures 7 and 8 are diagramcal curvature. matic views illustrating the difference in The upper part or smoothly curved part functioning between the structure shown in 11.7 will direct. rays straight ahead and in Figure 1 and those shown and 6. will direct rays to the two sides of the lens. The lens l0 is made preferably so that, it as sliown in diagram at f and gin Figure. is of generally concave-convex form, the lens 8, which divergin'gr of .rays or diflusing of having' a rim portion il ci the usual forni light is similarly carried out over the enhy means of which it is attached to a frame tire surface of' the llens shown in Figure l. 96

or bezel. The inner face of the lens, that is, Another vform o'f lens is shown in Figure the concave face, is formed with a series of 5, in which, from the line of division 16 on concentric annular refractory prisms 12. the outer tace of the lens, the prisms 14 ex Y these prisms extending substantially to the tend parallel with suoli lino of division, this in Figures diffused form, and the lower part of the lens rim oi" the lens, the center. of the Face being arrangement being particularly desirable lr'j occupied by a oulls-eyelor rounded hulged where the rays travel substantially str'ilrht portion lil. ahead from the upper part ot' the lens, as @n the outer or convex face oi the leus T. shown in Figure 7 at Il., which, in tratlic arrange a series of straight parallel iefrac.,.sig1iiils, warns the drivers of those vehicles tory prisms it, the center ol" the lens being n preferably formed into a rih l5 Which eX- advantageous iiisuch places where-thc lights lends across the center oi the lens and de are heinfjr changed constantly, and the lower finos the starting point from which tlicsoq rihs or prisms Ll direct the rays downward, straight parallel i-etiiicory prisms extend :is shown at 7L in Figure 7. so that those to the oder of tho lon gni tho lios! .-fl'ofi hy gr prisms so ihm', they have lual ing the straight This `form ot lens is particularly desirable greater angle 'towhere ay distant point is to hc -notiticd oi a.

most distant from the signals` which is Very 'm5 und i und that l closest to it will be attracted h v the signal. sie

10 straight pnrnllel refractory prisms, the un' nnlar prisms being 'graduated so that those nearest 'the rxn have a, grenier angie than ihose. nurest the centre, the straight; prisms being graduated so that those nearest the ccnra have u grenier angle than those nearet the rim.`

In testimony that I claim the forgong, havghereto set. my hand, this 29th day of lovember, 1922.

PAUL P. HOBNI. 

